National Research Council Canada. Security and Disruptive Technologies

Type

Article

Journal title

Optics Express

ISSN

1094-4087

Volume

24

Issue

25

Pages

28704–28712

Abstract

A novel type of fiber Bragg grating is produced by annealing a type I-like grating that is written with multiple infrared femtosecond laser pulses through a phase mask under conditions that are typically used to fabricate thermally stable type II gratings. This new grating is created through a process similar to a regenerative one and displays low loss and high resilience in a 1000 °C ambient environment. Such gratings are ideally suited for quasi-distributed sensing at high temperatures.